Camera Magnet Layout for Sensor-Shift Hand Shake Correction
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Solution Overview
Problem
The increasing diameter and weight of lenses in camera devices due to high pixelation make it difficult to secure sufficient electromagnetic force for hand shake correction, particularly in limited spaces.
Innovation Solution
A camera device design that moves the image sensor in three axes (x-axis shift, y-axis shift, and z-axis rolling) using different-sized magnets and coils, integrating the lens movement with the image sensor movement to perform hand shake correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens diameter is increased to achieve high pixelation, then the image quality is improved, but the weight of the lens increases and it becomes difficult to secure electromagnetic force for hand shake correction
Solution Approach 1:
Instead of moving the heavy lens for hand shake correction, the patent inverts the approach by moving the image sensor while keeping the lens stationary. This eliminates the need to generate electromagnetic force to move the heavy lens, solving the contradiction between high pixelation (large lens) and hand shake correction capability.
Solution Approach 2:
The camera device integrates multiple functions into a unified system where the image sensor serves both as the imaging element and the hand shake correction element. By combining lens driving and sensor driving functions in one system, the patent achieves hand shake correction without requiring separate electromagnetic driving mechanisms for the heavy lens.
2Measurement precision
If the lens diameter is increased for high pixelation, then the image quality is improved, but the space available for electromagnetic force generation is reduced
Solution Approach 1:
The patent reverses the traditional hand shake correction approach by stationary the lens and moving the image sensor instead. This inversion eliminates the need for electromagnetic force generation near the large-diameter lens, thereby resolving the space constraint contradiction.
3Ease of operation
If separate support parts are used for AF and OIS magnets, then the driving functions are independent, but the height and material costs increase
Solution Approach 1:
The patent merges the support parts for the AF magnet and OIS magnet into a single integrated support structure. This combining reduces the overall height (shoulder height) and material costs while maintaining both autofocus and optical image stabilization driving functions through shared structural support.
Solution Approach 2:
The integrated support part serves multiple functions: it supports both the AF magnet and OIS magnet, provides structural framework for both driving mechanisms, and enables both autofocus and hand shake correction functions within a compact space, eliminating the need for separate support structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design allows for effective hand shake correction while reducing the height and material costs of the camera device by integrating support parts for AF and OIS magnets, thus minimizing the shoulder height and material expenses.
Implementation Method 1
a first coil being disposed in the first moving part at a position corresponding to the first magnet; and a second coil being disposed in the second moving part at a position corresponding to the second magnet
Data Source
AI summary
The present embodiment relates to a camera device comprising: a fixed part; a first moving part disposed inside the fixed part and including a lens; a second moving part disposed below the first moving part and including an image sensor; a first magnet and a second magnet disposed in the fixed part; a first coil positioned in the first moving part so as to correspond to the first magnet; and a second coil positioned in the second moving part so as to correspond to the second magnet, wherein the first magnet and the second magnet are of different sizes, and at least a portion of the first magnet overlaps the second magnet in a direction parallel to the outer surface of a first side wall of the fixed part.